在 C# 中如何判断播放列表是否是音乐播放列表？

Question

到目前为止，我已经附加了我的代码，我的问题是所有播放列表都为其类型返回“auto”或“wpl”。 （这全部使用 WMPLib 参考）

mediaplayer = new WindowsMediaPlayer();
// Init. Playlists
IWMPPlaylistCollection plcollection = mediaplayer.playlistCollection;
plarray = plcollection.getAll();
int i = 0, count = plarray.count;
string[] t = new string[count];

// Here is where I want to sort out non-music playlists
// And add them to the ListBox
for (i = 0; i < count - 1; i++)
   t[i] = plarray.Item(i).getItemInfo("PlaylistType");

for (i = 0; i < count; i++ )
   PlaylistBox.Items.Add("" + plarray.Item(i).name);

不相关，但如果您知道如何将播放列表附加为数据而不是字符串，那也会很有帮助:)

Answer 1

我想您可以迭代播放列表项目，如果项目的“MediaType”属性等于“音频”，则认为此列表包含音频文件。像这样：

private bool ListHasAudio(IWMPPlaylist playList)
{
    if (playList != null && playList.count > 0)
    {
        for (int n = 0; n < playList.count; n++)
        {
            IWMPMedia media = playList.get_Item(n);
            string mediaType = media.getItemInfo("MediaType");
            if (mediaType != null && mediaType.Equals("audio", StringComparison.CurrentCultureIgnoreCase))
                return true;
        }
    }
    return false;
}

这是你如何使用它：

var mediaplayer = new WindowsMediaPlayer();
// Init. Playlists
IWMPPlaylistCollection plcollection = mediaplayer.playlistCollection;
var plarray = plcollection.getAll();
// Load list box items
for (int i = 0; i < plarray.count; i++)
{
    IWMPPlaylist playList = plarray.Item(i);
    if (ListHasAudio(playList))
        PlaylistBox.Items.Add(playList.name);
}

希望这有帮助，问候